Hetch Hetchy Reservoir and O'Shaughnessy Dam
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High-altitude surveillance footage captures the decade-long construction of the O'Shaughnessy-style
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O’shaughnessy Dam spillway at flowing at full force #water #waterfall #spring
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Most people have never heard of Yosemite’s “lost valley”, but before the O’Shaughnessy Dam was built, Hetch Hetchy looked almost identical to Yosemite Valley — waterfalls, meadows, granite walls, and a cathedral-like landscape John Muir called — one of Nature’s rarest and most precious mountain temples. For decades, this was America’s most heated conservation battle. Muir and the Sierra Club fought to protect this valley, but Congress approved the dam in 1913 — flooding the entire ecosystem unde
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